If the output current reaches the overcurrent stall level (OCS level) due to an overload operation,
the frequency is automatically reduced.
When the load returns to the correct level, the frequency is automatically returned to the original
setting, and the operation is continued. This function is effective for preventing overcurrent trips
in machines that knead glutinous materials, etc.
The function's validity and the deceleration time for automatically lowering the frequency when
the output current reaches the overcurrent stall level are set with this parameter.
The operation level (overcurrent stall level) can be set with parameter "P021: OSC level".
OCS level
(parameter P021)
Deceleration time
according to parameter
P020 setting value
Normal
acceleration time
Output
current
Output
frequency
Does not decelerate to below 10Hz
00
・
0.1 to 9.9
Data setting range(s)
* "00" is set when the current limit function is disabled.
P021
:
OCS level
The OCS level (overcurrent stall prevention operation level) and current limit function level can
be set with a percent (%) to the inverter's rated current.
1 to 200
Data setting range (%)
・
The OCS level and current limit levels are the same.
・
This setting is not related to the electronic thermal level and overload detection level.
・
When "P020: Current limit function" is already set, overcurrent trip prevention function still applies.
Note
Note
P020
:
Current limit function
74
P018, P021
Related
parameters
P018, P020
Related
parameters